add comments and remove non-working align method

1 files changed, 15 insertions, 4 deletions

diff --git a/os2eindopdracht/main.cpp b/os2eindopdracht/main.cpp
index bc7ce17..b451652 100644
--- a/os2eindopdracht/main.cpp
+++ b/os2eindopdracht/main.cpp
@@ -14,37 +14,48 @@
 using std::vector;
 using std::counting_semaphore;
 using std::thread;
+using std::ref;
 
 #define SAMPLE_BLOCK_SIZE 1024
 
 int main(int argc, char** argv) {
+	// parse arguments
 	Arguments args(argc, argv);
 
+	// read input file to std::string
 	std::fstream file_input(args.file_input, std::ios::in | std::ios::binary);
 	std::stringstream file_input_content;
 	file_input_content << file_input.rdbuf();
 	file_input.close();
 
+	// convert std::string to vector<int16_t>
 	SampleStream input(file_input_content.str());
+	// split into 1024-sample blocks
 	vector<SampleBlock> input_blocks = input.split(SAMPLE_BLOCK_SIZE);
 
+	// do the same for output stream (input stream is later used as reference but not mutated)
 	SampleStream output(file_input_content.str());
 	vector<SampleBlock> output_blocks = output.split(SAMPLE_BLOCK_SIZE);
 
+	// c++20 semaphore for limiting active thread count
 	counting_semaphore semaphore(args.max_threads);
+	// thread array
 	vector<thread> threads;
 	for (size_t i = 0; i < input_blocks.size(); i++) {
-		semaphore.acquire();
+		semaphore.acquire(); // wait until less than args.max_threads threads are running
+		// create thread
 		threads.push_back(thread([&args, &semaphore](SampleBlock& input, SampleBlock& output) {
+			// apply filter to output
 			FilterWorker(input, output).filter(args.bass, args.treble);
+			// allow new thread to be created
 			semaphore.release();
-		}, std::ref(input_blocks[i]), std::ref(output_blocks[i])));
+		}, ref(input_blocks[i]), ref(output_blocks[i])));
 	}
 
+	// make sure all threads are done
 	for (thread& t : threads) t.join();
 
-	output.align(SAMPLE_BLOCK_SIZE);
-
+	// write pcm stream to output file
 	std::fstream file_output(args.file_output, std::ios::out | std::ios::binary);
 	std::string edited_stream = output.save();
 	file_output.write(edited_stream.c_str(), edited_stream.size());